[PATCH] USB: sl811-hcd minor fixes

Three minor sl811-hcd fixes:

 - Elminate memory leak on one (rare) disable/shutdown path.

 - For periodic transfers that don't need to be scheduled, update
   urb->start_frame to represent the transfer phase correctly.

 - Report the (single) port as removable, by default.

Since no drivers yet use start_frame or that part of the hub descriptor,
only that leak is likely to ever matter.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

 drivers/usb/host/sl811-hcd.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index d2a1fd40dfcb..d42a15d10a46 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -782,6 +782,9 @@ retry:
 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
  * this driver doesn't promise that much since it's got to handle an
  * IRQ per packet; irq handling latencies also use up that time.
+ *
+ * NOTE:  the periodic schedule is a sparse tree, with the load for
+ * each branch minimized.  see fig 3.5 in the OHCI spec for example.
  */
 #define MAX_PERIODIC_LOAD       500     /* out of 1000 usec */
 
@@ -843,6 +846,7 @@ static int sl811h_urb_enqueue(
         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
                         || !HC_IS_RUNNING(hcd->state)) {
                 retval = -ENODEV;
+                kfree(ep);
                 goto fail;
         }
 
@@ -911,8 +915,16 @@ static int sl811h_urb_enqueue(
         case PIPE_ISOCHRONOUS:
         case PIPE_INTERRUPT:
                 urb->interval = ep->period;
-                if (ep->branch < PERIODIC_SIZE)
+                if (ep->branch < PERIODIC_SIZE) {
+                        /* NOTE:  the phase is correct here, but the value
+                         * needs offsetting by the transfer queue depth.
+                         * All current drivers ignore start_frame, so this
+                         * is unlikely to ever matter...
+                         */
+                        urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
+                                                + ep->branch;
                         break;
+                }
 
                 retval = balance(sl811, ep->period, ep->load);
                 if (retval < 0)
@@ -1122,7 +1134,7 @@ sl811h_hub_descriptor (
         desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
 
         /* two bitmaps:  ports removable, and legacy PortPwrCtrlMask */
-        desc->bitmap[0] = 1 << 1;
+        desc->bitmap[0] = 0 << 1;
         desc->bitmap[1] = ~0;
 }